DS1985 Description
19-4892; Rev 8/09.
DS1985 Key Features
- 16384 bits Electrically Programmable Read Only Memory (EPROM) municates with the economy of one signal plus ground
- EPROM partitioned into 64 256-bit pages for randomly accessing packetized data records
- Each memory page can be permanently write protected to prevent tampering
- Device is an “add only” memory where additional data can be programmed into EPROM without disturbing existing data
- Architecture allows software to patch data by superseding an old page in favor of a newly programmed page
- Reduces control, address, data, power, and programming signals to a single data pin
- 8-bit family code specifies DS1985 munications requirements to reader
- Reads over a wide voltage range of 2.8V to 6.0V
- Unique, factory-lasered and tested 64-bit registration number (8-bit